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KMID : 0361419970210020341
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Journal of Korean Academy of Rehabilitation Medicine
1997 Volume.21 No. 2 p.341 ~ p.348
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Effects of Temperature on Motor Unit Action Potentials
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Abstract
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This study was performed to evaluate of temperature effects on motor unit action potentials by automatic method in twenty healthy adults. Twenty separate motor unit action potentials by automatic method in twenty adults. Twenty separate motor
unit
action potentials were recorded in the bieeps brachii with concentric needle electrodes at the three different skin temperatures. The skin temperature of the arm was cooled with coldpack below 24℃ and warmed with infrared above 38.5℃.
The measured parameters of motor unit action potentials were amplitude, duration, area, spike duration, spike area and number of phases and turns. As the skin temperature was decreased, all parameters except number of turns were
increased(p<0.05).
And
the larger changes were developed by cooling than warming. At three temperature settings, rise time was inverse relationship with amplitude and number of phases and turns. And in general other parameters of motor unit action potentials showed
significant positive correlation.
Therefore the temperature is a very important considering factor and must be standardized or controlled during analysis of motor unit action potentials.
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